Pump.



Patented Oct. 7, |902.

G. E. GREEN.

PuM P.

v (Application filed Feb. 15, 1902.)

(No Model.)

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GEORGE E. GREEN, OF GREENOASTLE, MISSOURI.

PUMP.

SPECIFICATION forming part of Letters Patent No. 710,856, dated October'7, 1902.

Application filed February 15, 1902. Serial No. 94,197. (No model.)

To all whom t may concern.-

eitknown that l, GEORGE E. GnEnN,acit Zen of the United States, and aresident of Greencastle, in the county of Sullivan and Slate ofMissouri, have made certain new and useful Improvements in Pumps, ofwhich the following is a specification.

My invention relates to that class of pumps commonly known asdouble-acting-that is, pumps having means for causing a continuous flowof water from the egress-tubes; and the invention consists in certaindetails of construction which I will now proceed to describe, referencebeing had to the accompanying drawings, which form a part of thisspeeitication, and in which- Figure l isacentral vertical sectionthrough all the working parts. Fig. 2 is an inverted plan View of thetop casting connecting the cylinder and side tubes; and Fig. 3 is a topplan view of the lower casting connecting the parts mentioned in Fig.c., the cylinder and side tubes.

In the drawings, A denotes the cylinder, and B B the side tubes. Thecylinder and side tubes are connected at their upper end byaspecialcasting C and are also connected by a second casting D ot novelconstruction at their lower ends. The upper casting is provided with athreaded outlet E, adapted to connect a delivery-pipe, and the lowercasting has an inlet-opening F, threaded similar to the outlet E in theupper casting for connecting a supply-tube, as will be understood. Asshown in Figs. 2 and 3, both castings C and D have an enlarged seat orsocket G, adapted to receive its respective end of the cylinder A, andthe sockets contain a threaded opening H. Between the opening I-I andthe side walls of the sockets is a curved opening I, communicating witha threaded opening .I at one end of the casting. It will be noticed thatthe opening I in one casting is on one side of the socket G, while thelike opening I of the other casting is located at an oppositeside ofthesocket. Each casting is also provided with a threaded opening K, whichwith the openings H ot both castings com municate with a passage-way I.,as shown in Fig. 1 of the drawings.

The opening II of the lower casting is closed by a downwardly-seating orgravity valve M,

supported by a stem N, passing through and guided by a cross-bar or webO of a ringshaped or hollow plug P, screwed into the opening II. 'lhemovement or play ot the valvekM is limited by a nut Q, threaded on thelowerend of the stem N. The lower end of the side tubes B are threadedinto theirrespective openings J K of the lower casting D, and the upperend of said side tubes screw into a thimble R, threaded into theopenings J K ot the upper casting C, and the said thim bles R form seatsfor a down wardly-seating or gravit-y valve S, having suitableguidepins, as shown. In the opening` H ot the upper casting is alsothreaded an annular seat 'F for the valve U, arranged and having slidingmotion on the piston-rod V. The valve U should be packed, as shown, toprevent leakage.

In the casting O, I provide a stop IV to limit the movement ot' thevalve UQ 'lhis stop, as also the stops B', is formed in one piece withthe casting. It is obvious that the ends of cylinder A should Ybe packedto prevent leakage, such as with a rubber gasket in the sockets G.

In the manufacture of my pump the castings O Dare each molded in onepiece by well-known hollow-molding methods. The cylinder A may be ofbrass, while ordinary iron tubing will answer for the side tubes B.

In assembling the several parts of my pump the cylinder A is arranged inthe socket of the lower casting after arranging the valve M in place andthe tubes B screwed in the openings .I K of said casting, as shown.Before connecting the upper casting the valve U is placed on thepiston-rod V and the thimble T, forming the valve-seat, is screwed toplace, as shown. The thimbles R have internal as well as externalthreads-z'. c., the latter are reverse to therinternal threadsthusproviding each thimble with a right and a left thread. Now havingarranged the valves S in place and the thimbles R started into theopenings J K the casting C ismoved until the inner reverse thread ofthethimbles engage with similar threads on the tubes B, when by continuingto turn the said thimbles, as with a wrench, all the parts will be drawntightly together with the upper end of the cylinder A in place in thesocket G.

ICO

In operation a downward stroke'of the piston, with the valve U on itsseat, draws water up through the suction-tube, the passage-Way L, andconnected side tube B, lifting the valve S to the stop B, with the Waterowing through the opening I into the cylinder in rear of the pistonuntil the piston has reached the end of its stroke. Now upon a return orupward stroke of the piston the said valve S by' gravity seats itselfand the valve U is lifted to the stop XV by force of the Water and thelatter passes up into the passage-way L ofthe upper casting. When thepiston starts on its upward stroke, the valve M will be lifted from itsseat, and, the valve S being closed, water will be drawn into thecylinder in rear of the piston until the piston reaches the limit of itsstroke. Now upon a downward movement or stroke of the piston the valve Mwill close and the water contained in the cylinder will be forcedthrough the lower opening I to and up the connected tube B, lifting itsvalve S against the pressure of Water in the passage-way L. At the sametime the valve U being seated suction created in rear of the piston willlift the valve S in operative connection therewith and draw waterthrough the passage-way L of the lower casting, communicating tube B,curved opening I, and into the cylinder in rear of the piston.

With the above construction and arrangement of the end castings,lcylinder, side tubes, and valves it is appareutthat both strokes of thepiston force Water into the passage-way L of the upper casting firstthrough one or the other of the valves S U, according to the movement orstroke of the piston, and consequently with a reciprocal motion of thepiston a continuous flow of water is forced through the passage-way Land up through the opening E to be delivered as may be desired.

I am aware that double-acting pumps eniploying a cylinder, side tubes,and end castings are not broadly new, and I do not, therefore, desire toclaim such as myinvention; but I do think that my special end casting C,taken as a whole-that is, formed with the stops B and other integralfeatures specied-is new and that the special combinations of featurespointed out in the claims are also new.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The combination in a double-acting pump employing a cylinder andseparate side tubes as shown, of vertically-guided Valves all of whichseat by gravity, special end castings having water passage-waysconnecting the cylinder and side tubes as shown, and means substantiallyas specified whereby the end castings cylinder and side tubes may besecured together, the lower end casting having two passage-ways both ofwhich connect the cylinder and one side tube as shown and one of saidpassages having a gravity-valve op.

erating to close backiiow from the cylinder, the upper end castinghaving two passageways both of which connect the cylinder and one sidetube as shown, the cylinder and side tube communications, in operation,being closed by free and guided gravity-valves 1ocated within the saidcasting and the said valves` limited in upward play by stops, as shown,integral with the casting and the cylinder-valve sliding on thepiston-rod, all constructed arranged and operating substantially asdescribed.

GEORGE E. GREEN.

Witnesses:

E. J. HANNAH, E. C. HUNTER.

